The frame on my rollers has corroded beyond recognition, and I never use
them anymore. But the roller drums themselves are still good. Two of them
are PVC covered wood (McLain), the third is all PVC (Tacx, replacement). All
are "standard" roller diameter, around 5.5 inches. Sealed bearings in decent
condition, especially on the Tacx drum. Tacx drum is around 10 years old,
the other 2 are probably 20-30 years old, I've had these since 1989 and I'm
not the original owner.
If anyone needs a replacement drum or three, let me know if you want more
details (dimensions, pics, etc), or make me an offer. These will likely go
in the garbage if no one wants them, which seems wasteful.